BoilerFaultCodes ERROR CODE 7 High
Boiler Fault Code ERROR CODE 7
Also written as ERRORCODE7 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code ERROR CODE 7 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has shut down because it has detected that the exhaust gases are becoming dangerously hot, which usually suggests a serious internal blockage or a lack of water circulation. (As reported on Ideal Icos HE)
Pick your boiler brand for the ERROR CODE 7 fix
Source
Information for the ERROR CODE 7 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026